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Porsche > Panamera 970 MK1 (2009-2013) > 970.1 Panamera V6 3.6L 2WD 2009-13 > Engine Rebuild Parts > Engine Valves / Guides / Springs >

Engine cylinder head inlet valve. Porsche 911 3.0L / 3.2L 1974-89  ❭  93010540901

Engine cylinder head inlet valve. Porsche 911 3.0L / 3.2L 1974-89 - 93010540913, 93010540901, 93010540900, 93010540901, 93010540913 - V94268
2
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93010540901/1
Product Information
Product Information
Engine cylinder head inlet valve.
Manufactured to OEM specifications, this valve matches the factory dimensions, seat angle, and stem diameter for perfect sealing and valve timing accuracy. Built from high-grade heat-resistant steel, it delivers excellent thermal stability and wear resistance, ideal for the demanding environment of Porsche’s high-revving flat-six engines.

Fits:

Porsche Carrera 3.0ltr - 1976 to 1977 
Porsche 911 SC 3.0ltr - 1978 to 1983 
Porsche 911 3.2 Carrera - 1983 to 1989

Valve head diameter 49,00 mm
Valve stem diameter 9,00 mm
Length 110,10 mm
Valve seat angle 45 °

Diagram Ref No 9.

Function:
The inlet valve controls the flow of air-fuel mixture into the combustion chamber. Proper sealing and timing are essential for maintaining compression, combustion efficiency, and overall power output. A high-quality OE Match valve ensures consistent intake airflow, reliable operation, and long engine life.

Why & When Replacement Matters

Why: Over time, inlet valves experience wear from heat, carbon build up, and mechanical stress, which can lead to reduced compression, power loss, and rough engine operation.
When: During engine rebuilds or cylinder head servicing If there are signs of valve leakage, pitting, or stem wear.  When experiencing loss of power, misfires, or compression imbalance. As preventive maintenance on high-mileage engines or performance builds.

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Click 'Zoom in' for large parts diagram.
Diagram ref no 10

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Click 'Zoom in' for large parts diagram.
Diagram Ref No 20

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